Worktree button is grayed out with tooltip "worktree requires git repository"

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Symptom: Worktree button is grayed out with tooltip "worktree requires git repository"
Environment: macOS, valid git repo with existing worktrees
Verified: git worktree list, git status, and git worktree prune all work correctly

What Should Happen?

The use worktree option should light up blue to automatically create a worktree

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code
2. Initiate a new session
3. Select the folder
4. Attempt selecting the use worktree button but it is grayed out

Github is enabled in settings. I have tried disconnecting and reconnecting. Had had success in the past with worktrees self-generating automatically without any issue until now for no apparent reason.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.1.1520 (48ced7)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_